Module 3 Flashcards
Information Hiding
Information Encryption
Data is visible, but the content is scrambled and meaningless to those without the cryptographic key.
Information Hiding
The goal is to prevent others from knowing that hidden information even exists.
Steganography
The practice of hiding information within other non-suspicious data, such as an image or text.
Watermarking
A method to mark a digital asset to demonstrate ownership.
Cover Media
The media that will hold the hidden data (e.g., image, network packets, executable files).
Secret Message
The data that is hidden within the cover media.
Stego Function
The function responsible for embedding or hiding the secret message in the cover media.
Stego Object
The output of embedding a secret message into the cover media (i.e., cover media + secret message).
Plaintext Steganography
Steganography using selected characters and positions in the cover media to hide a message.
Image Steganography
Using images to hide binary data as a secret message within an image file.
Least Significant Bit (LSB)
Hiding information in the least significant bits of pixels or audio samples in an image or audio file.
Discrete Cosine Transform (DCT)
Using the frequency components of images (as done in JPEG compression) to hide data.
Audio Steganography
Hiding information in an audio file, typically by replacing least significant bits of audio samples.
Datagram Steganography
Using fields in datagrams (such as IP identification or TCP sequence numbers) to hide data.
Public Watermarking
A watermark that can be read by anyone, often used to track illicit use of digital assets.
